Grid Mini E Power Storage 
Green Car Congress
SEPTEMBER 1, 2013
BMW Group and Vattenfall have started a new research project on the secondary use of high-voltage EV batteries using batteries from the MINI E and the BMW ActiveE as stationary power storage.
Green Car Congress
JUNE 21, 2016
Following in-vehicle usage, the BMW i3 battery retains most of its original capacity, thus continuing to offer years of emissions free power storage and expanding the sustainability concept beyond the individual vehicle life. In 2014, BMW integrated high-voltage batteries into a stationary storage system in Hamburg.
Green Car Congress
MARCH 28, 2017
Pending on a final investment decision the largest battery storage will be built at the Vattenfall wind farm Pen y Cymoedd (230 MW) in South Wales—a 22 MW storage facility, which will help to support the stability of the country-wide power grid in the UK as part of the so-called EFR (Enhanced Frequency Response) service.
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